Hach DR2400 - Page 420

Nickel
© Hach Company, 2003. All rights reserved. Printed in the U.S.A. 3/04 1ed
Page 4 of 4 Nickel_UniCell_Other_DIMETH_Eng_Ody.fm
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Method Performance
Precision
Standard: 2.00 mg/L Free Ni
See Section 3.4.3 Precision on page 44 for more information, or if the standard
concentration did not fall within the specified range.
Sensitivity
See Section 3.4.5 Sensitivity on page 44 for more information.
Summary of Method
In the presence of an oxidizing agent, nickel ions react with dimethylglyoxime in
an alkaline solution to form an orange-brown colored complex. Measurements
are taken at 463 nm.
Required Reagents
Description Unit Cat. No.
Nickel - Ni, UniCell™ HCT 167 ....................................................................................... 23/pkg.............. HCT 167
Required Apparatus
Adapter, 16-mm Cell ........................................................................................................................ each........................59457-00
Optional Apparatus
Flask, Class A, volumetric, 100-mL.................................................................................. each....................14574-42
Graduated cylinder, mixing, 100-mL............................................................................... each....................20886-42
Pipettor, (Jencons) 1–5 mL................................................................................................. each....................27951-00
Replacement tips for 27951-00 .......................................................................................... pkg/100.............27952-00
Pipettor, (Jencons) 100–1000 µL........................................................................................ each....................27949-00
Replacement tips for 27949-00 .......................................................................................... pkg/400.............27950-00
pH Paper.............................................................................................................................. pkg/100.............26013-00
Optional Standards
DRB 100 Digital Reactor .................................................................................................... each....................DRB 100
Metal Prep Set, HCT 200.................................................................................................... 50 digestions.... HCT 200
Nickel Standard Solution, 1000-mg/L as Ni .................................................................. 100 mL...............14176-42
Nitric Acid Solution, 1:1 .................................................................................................... 500 mL.................2540-49
Sodium Hydroxide, 5 N..................................................................................................... 1 L ........................2450-53
Program 95% Confidence Limits of Distribution
328 1.76–2.24 mg/L Free Ni
Program Portion of Curve ∆Abs ∆Concentration
328 Entire range 0.010 0.007 mg/L Free Ni